Subterranean conduit



(No Model.)

F. LANG.

SUBTERRANEAN GONDUIT.

No. 517,345. Patented Mar. 27, 1894.

8 f b r x U H H W. 4 m

WITNESSES. I INVENTOR,

ATT NE).

UNITED STATES PATENT OFFICE.

FRIEDRICH LANG, OF CLEVELAND, OHIO.

SUBTERRANEAN CONDUIT.

SPECIFICATION forming part of Letters Patent No. 517,345, dated March27,1894.

Application filed May 29, 1893. Serial No.475,884. (No model.)

To all whom it may concern:

Be it known that I, FRIEDRICH LANG, a citizen of the United States, anda resident of Cleveland, in the county of Cuyahoga and State of Ohio,have invented a new and 1m proved Subterranean Conduit; and I do herebydeclare that the following is a complete, true, and exact descriptionthereof.

My invention relates to subterranean conduits generally and theimprovement consists in the application and mounting of speciallyprepared material for said purpose.

The object of my improvement is not only to facilitate the constructionof said conduits but also and more particularly so to attain resultswhich answer the sanitary requirements when the structure is to serve asa sewer.

That my improvement may be fully understood and seen, reference will behad to the following specification and the accompanying drawings, inwhich- Figurel represents a partial plan View of a structure abovereferred to. Fig. 2 is a cross section of the same and Fig. 3 is alongitudi nal side View.

Like letters of reference denote like parts in the drawings andspecification.

In the plan View Fig. 1 only the lower portion of the conduit isshown,AA being shells which rest upon piers B see Figs. 2 and 3.

Said piers serve as foundation and are erected according to the gradeline essential for the conduit set thereon. Either stone or concretematerial may be used for this foundation. Excavations being done andpiers laid, but comparatively short time is required for mounting theconduit. The shells A A are arranged in line and all the crevicesaformed by the adjoining ends are filled with plastic binding material,simultaneously with this operation a coating is also given to the facesI), which renders the understructure ready to receive the covers orcrown pieces C. The covers in turn are also filled as seen at c and theconduit is ready to serve for the purpose intended A sewer so built orcomposed of parts as above described remains perfectly smooth on theinside in so far as the cementing is confined within the crevices orneither will the jointed covers permit of the cement to reach and defacethe interior. Sewers of very large profile are built of more than twoparts, side pieces may be interposed between the bottom shells andcovers, the sealing of joints being done in the same manner asdescribed. The material being dried before insertion will in that statenot be affected by the corroding influence of the surrounding earth.Sewers being egg shaped as shown represent a diminished frictionalsurface for low levels, drainage is thereby promoted, furthermore theinterior being entirely smooth accumulations of sediment and decomposingmatter can not exist, hence theabsence of health destroying odors or theso called sewer gas.

The building material, that is the sectional parts, of which the seweris to be composed I have described and claimed in a separate applicationfor Letters Patent.

I claim- A subterranean conduit consisting of a series of upper andlower longitudinal pieces curved in cross-section and placed one abovethe other to form a conduit, the upper ones over-lapping the joints ofthose below, the adjacent longitudinal edges of each piece havingrespectively grooves and projections extending from end to end thereofand resting one within the other, and the adjacent transverse edge ofeach piece provided with registering grooves to receive cement,substantially as shown and described.

In testimony whereof I hereunto set my hand in presence of twowitnesses.

FRIEDRICH LANG.

Witnesses:

JACOB LANG, GOTTFRIED TELL.

